2 hashmap examples#11150
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I definitely like the idea of examples for What do you think? |
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Sounds good; changed the example. |
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Let's drop these intermediate println statements because while they might make the output prettier they're cluttering up the code example a little bit.
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Nice job! r=me with that change |
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(I removed the `fn main` from the `std::rand` examples to make it consistent with the rest of the codebase.)
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…, r=Jarcho lint when calling the blanket `Into` impl from a `From` impl Closes rust-lang#11150 ``` warning: function cannot return without recursing --> x.rs:9:9 | 9 | / fn from(value: f32) -> Self { 10 | | value.into() 11 | | } | |_________^ | note: recursive call site --> x.rs:10:13 | 10 | value.into() | ^^^^^^^^^^^^ ``` I'm also thinking that we can probably generalize this lint to rust-lang#11032 at some point (instead of hardcoding a bunch of impls), like how rustc's `unconditional_recursion` works, at least up to one indirect call, but this still seems useful for now :) I've also noticed that we use `fn_def_id` in a bunch of lints and then try to get the node args of the call in a separate step, so I made a helper function that does both in one. I intend to refactor a bunch of uses of `fn_def_id` to use this later I can add more test cases, but this is already using much of the same logic that exists for the other impls that this lint looks for (e.g. making sure that there are no conditional returns). changelog: [`unconditional_recursion`]: emit a warning inside of `From::from` when unconditionally calling the blanket `.into()` impl
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(I removed the
fn mainfrom thestd::randexamples to make it consistent with the rest of the codebase.)